CN205317913U - Monitoring sensor of intelligent monitoring fire control device power voltage and electric current - Google Patents
Monitoring sensor of intelligent monitoring fire control device power voltage and electric current Download PDFInfo
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- CN205317913U CN205317913U CN201521107126.5U CN201521107126U CN205317913U CN 205317913 U CN205317913 U CN 205317913U CN 201521107126 U CN201521107126 U CN 201521107126U CN 205317913 U CN205317913 U CN 205317913U
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Abstract
The application discloses monitoring sensor of intelligent monitoring fire control device power voltage and electric current is connected with fire control device power monitoring host and supplementary alarm device respectively, including communication interface circuit, master control MCU, control output circuit, DI state acquisition circuit, analog quantity acquisition circuit and state information display circuit, keying circuit and buzzer circuit. Keying circuit, buzzer circuit, state information display circuit, communication interface circuit, control output circuit, DI state acquisition circuit and analog quantity acquisition circuit are connected to master control MCU respectively, and the communication interface circuit still is connected to fire control device power monitoring host, DI state acquisition circuit connection arrives fire control device power switch auxiliary contact, control output circuit still is connected to supplementary alarm device for control external supplementary alarm device work.
Description
Technical field
This utility model relates to electronic device field, specifically, relates to the monitoring sensor of a kind of intelligent monitoring fire-fighting equipment supply voltage and electric current.
Background technology
Along with the progress of the development of economic society and science and technology, electrically driven (operated) fire-fighting equipment progressively becomes the important force ensureing people's security of the lives and property. Due to the particularity of fire-fighting equipment, it is in power-off or static power down mode at ordinary times. If not breaking out of fire, it is possible to a lot of people are all without noticing the presence of which. Therefore, the power supply of fire-fighting equipment, probably due to long-standing neglect or safeguard and improper cause powerup issue, in turn results in these equipment and cannot work when breaking out of fire, cause serious life and property loss.
At present, fire-fighting equipment power supply monitoring system is mainly the organizational structure of fire-fighting equipment Power Supply Monitoring main frame+some fire-fighting equipment Power Supply Monitoring sensors. In this structure, monitoring sensor self does not have stand-by power supply, it is necessary to it is powered by monitoring host computer, connects to form monitoring network with industrial field bus between monitoring sensor and monitoring host computer simultaneously.
The theory diagram of overwhelming majority fire-fighting equipment Power Supply Monitoring sensor is constituted as shown in Figure 4 in the market. In block diagram, line represent have information transmission couple relation. Sensor main body is described below:
1. man machine interface: include imported functional module dial-up circuit (for arranging the communications parameter of sensor, such as address and communication baud rate etc.), output type functional module status information display circuit (for showing the various status information relevant to sensor). In sensor main body, the functional module of man machine interface all couples mutually with main control MCU, and the unidirectional incoming MCU of information of imported functional module, the information of output type functional module is unidirectional incoming from MCU.
2. control output circuit: for controlling external additional alarm device when device is reported to the police, for instance powerful siren, alarm lamp, alarm bell etc. In sensor main body, controlling output circuit and couple mutually with main control MCU, information is unidirectional incoming from MCU.
3.DI state acquisition circuit: for receiving the state of the auxiliary contact of external fire-fighting equipment on and off switch, the on off operating mode of auxiliary contact and fire-fighting equipment on and off switch one_to_one corresponding, therefore may determine that the open and-shut mode residing for fire-fighting equipment on and off switch.In sensor main body, DI state acquisition circuit couples mutually with main control MCU, unidirectional incoming MCU in the way of digital signal.
4. analog quantity acquisition circuit: for gather monitor the voltage of fire-fighting equipment power supply, current signal and signal is carried out necessity filtering and orderliness. In sensor main body, analog quantity acquisition circuit couples mutually with main control MCU, unidirectional incoming MCU in the way of analogue signal.
5. communication interface circuit: for forming a monitoring network with monitoring host computer, it is achieved the function that Monitoring Data is uploaded and control command is assigned. In sensor main body, communication interface circuit couples mutually with main control MCU, and information is in bi-directional between the two.
According to the summary to existing procucts in the market, having a maximum weak point is that sensor can not work alone, and concrete manifestation is as follows:
1. the running parameter of sensor can not all be set by this locality: in the running parameter of sensor except the parameter that communication is relevant, all requires over monitoring host computer and is set. This makes sensor to connect could to use at monitoring host computer. It addition, the metal plectrum in toggle switch can get rusty in atmosphere in long-time exposure so that it is electric conductivity declines, it is easy to causes that the communications parameter of device changes, communication failure occurs.
2. cannot show detailed monitoring information: sensor in the market all adopts LED light to show work and the monitor state of sensor, but LED light is generally less, can not very accurately demonstrate the state that sensor is concrete, it is necessary to inquired about by monitoring host computer. It addition, the voltage of Sensor monitoring and current value can not show in the sensor, the investigation of this fire equipments power failure brings very big inconvenience.
3. cannot be carried out acoustic alarm: current all of sensor, all without adding acoustic alarm function, when sensor detects fire-fighting equipment power failure, only carries out light warning. It is known that sensor may be arranged on on-the-spot very complicated place, if sensor is subject to blocking of miscellaneous equipment or object, will be not easy to be found by maintainer and position very much.
Utility model content
Technical problem to be solved in the utility model is to provide the monitoring sensor of a kind of intelligent monitoring fire-fighting equipment supply voltage and electric current, for monitoring the power supply of fire-fighting equipment. When monitored power supply generation overvoltage, under-voltage, phase shortage, misphase, power failure, cross stream etc. affect the fault that fire-fighting equipment works time, sensor can carry out fault alarm, notify that attendant overhauls, and then guarantee the power supply of fire-fighting equipment be in all the time the best upstate, stopped fire-fighting equipment because of power failure inoperable situation.
For solving above-mentioned technical problem, this utility model provides the monitoring sensor of a kind of intelligent monitoring fire-fighting equipment supply voltage and electric current, it is connected with fire-fighting equipment Power Supply Monitoring main frame and additional alarm device respectively, including communication interface circuit, main control MCU, control output circuit, DI state acquisition circuit, analog quantity acquisition circuit and status information display circuit, it is characterized in that
The monitoring sensor of described intelligent monitoring fire-fighting equipment supply voltage and electric current also includes key circuit and buzzer circuit, described key circuit, described buzzer circuit, described status information display circuit, described communication interface circuit, described control output circuit, described DI state acquisition circuit and described analog quantity acquisition circuit are connected respectively to described main control MCU
Described key circuit is used for the running parameter to sensor and communications parameter is set and collection data and duty are inquired about;
Described buzzer circuit is for carrying out audible alarm when fire-fighting equipment power failure;
Described communication interface circuit is also connected to described fire-fighting equipment Power Supply Monitoring main frame, for Monitoring Data is sent to described fire-fighting equipment Power Supply Monitoring main frame, and receives the command information that described fire-fighting equipment Power Supply Monitoring main frame sends;
Described DI state acquisition circuit is connected to fire-fighting equipment on and off switch auxiliary contact, for receiving the state of described fire-fighting equipment on and off switch auxiliary contact, and the state collected is sent to main control MCU;
Described analog quantity acquisition circuit, for gathering the voltage and current signal of the fire-fighting equipment power supply monitored, is filtered voltage and current signal and nurses one's health, and the signal after processing is sent to described main control MCU;
Described control output circuit is also connected to described additional alarm device, for controlling external additional alarm device work.
Preferably, wherein:
Described status information display circuit farther includes liquid crystal display, the fault message that the voltage x current value and fire-fighting equipment power supply for showing Sensor monitoring in real time exists.
Preferably, wherein:
Described control output circuit is control relay circuit.
Preferably, wherein:
Described analog quantity acquisition circuit includes voltage collection circuit and current collection circuit,
The circuit that described voltage collection circuit is connected in series by current-limiting resistance, voltage transformer, the first sampling resistor and the first add circuit by one or more groups is constituted, described current-limiting resistance one end connects fire-fighting equipment power voltage input terminal, and the other end is connected to described voltage transformer; Described voltage transformer is connected to described first sampling resistor, and described first sampling resistor is connected to the first add circuit; Described first add circuit is also connected to described main control MCU;
The circuit that described current collection circuit is connected in series by current transformer, the second sampling resistor and the second add circuit by one or more groups is constituted, described current transformer one end connects fire-fighting equipment source current input, the other end connects the second sampling resistor, described second sampling resistor connects described second add circuit, and described second add circuit is also connected to described main control MCU.
Preferably, wherein:
Described DI state acquisition circuit is the circuit being made up of one or more photoelectrical couplers.
Compared with prior art, the monitoring sensor of intelligent monitoring fire-fighting equipment supply voltage described in the utility model and electric current, reach following effect:
1) this utility model provides intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor of electric current, collocation method presents multiformity, convenient for users to use. Running parameter is all saved in the memorizer in device, steady in a long-term, it is to avoid the communication failure problem caused because of the accidental change of communications parameter.
2) this utility model provides intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor of electric current, panel increases liquid crystal display, it is possible to display Sensor monitoring arrives in real time magnitude of voltage, current value, display fault existing for fire-fighting equipment power supply. Pass through button operation, it is possible to inquire the logout that sensor records easily, the information such as running parameter.
3) the intelligent monitoring fire-fighting equipment supply voltage of this utility model offer and the monitoring sensor of electric current increase buzzer circuit, reach the purpose of sound and light alarm together with LED light. Acoustic alarm signal is with its unique characteristic, it is possible to prompting patrol officer carries out malfunction elimination in time.
4) this utility model provides intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor of electric current can depart from monitoring host computer and independently from, it is particularly suitable for applications in some less occasions of fire fighting device needing monitoring, both meet the requirement of fire-fighting equipment Power Supply Monitoring, reduce again the cost of monitoring system.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing being further appreciated by of the present utility model, constitutes a part of the present utility model, and schematic description and description of the present utility model is used for explaining this utility model, is not intended that improper restriction of the present utility model. In the accompanying drawings:
Fig. 1 is the composition schematic diagram of the monitoring sensor of the intelligent monitoring fire-fighting equipment supply voltage of the application and electric current;
The one that Fig. 2 is analog quantity acquisition circuit in the intelligent monitoring fire-fighting equipment supply voltage of the application and the monitoring sensor of electric current constitutes schematic diagram;
The one that Fig. 3 is DI state acquisition circuit in the intelligent monitoring fire-fighting equipment supply voltage of the application and the monitoring sensor of electric current constitutes schematic diagram;
Fig. 4 is the composition block diagram of fire-fighting equipment Power Supply Monitoring sensor in prior art.
Detailed description of the invention
As employed some vocabulary in the middle of description and claim to censure specific components. Those skilled in the art are it is to be appreciated that hardware manufacturer may call same assembly with different nouns. This specification and claims are not used as distinguishing in the way of assembly by the difference of title, but are used as the criterion distinguished with assembly difference functionally. " comprising " as mentioned in the middle of description and claim in the whole text is an open language, therefore should be construed to " comprise but be not limited to ". " substantially " referring in receivable range of error, those skilled in the art can solve described technical problem within the scope of certain error, basically reaches described technique effect. Additionally, " coupling " word comprises any directly and indirectly electric property coupling means at this. Therefore, if a first device described in literary composition is coupled to one second device, then represents described first device and can directly be electrically coupled to described second device, or be indirectly electrically coupled to described second device by other devices or the means that couple. Description subsequent descriptions is for implementing better embodiment of the present utility model, and right described description is to illustrate for the purpose of rule of the present utility model, is not limited to scope of the present utility model. Protection domain of the present utility model is when being as the criterion depending on the defined person of claims.
Below in conjunction with accompanying drawing, this utility model is described in further detail, but not as to restriction of the present utility model.
In conjunction with Fig. 1, this utility model provides the monitoring sensor 100 of a kind of intelligent monitoring fire-fighting equipment supply voltage and electric current, it is connected with fire-fighting equipment Power Supply Monitoring main frame and additional alarm device respectively, including communication interface circuit 20, main control MCU 10, controls output circuit 30, DI state acquisition circuit 40, analog quantity acquisition circuit 50, status information display circuit 80, key circuit 60 and buzzer circuit 70. Described key circuit 60, described buzzer circuit 70, described status information display circuit 80, described communication interface circuit 20, described control output circuit 30, described DI state acquisition circuit 40 and described analog quantity acquisition circuit 50 are connected respectively to described main control MCU 10; Described key circuit 60 for being set and control the information of inquiry sensor to the running parameter of sensor; Described buzzer circuit 70 is for carrying out audible alarm when fire-fighting equipment power failure; Described communication interface circuit 20 is also connected to described fire-fighting equipment Power Supply Monitoring main frame, for Monitoring Data is sent to described fire-fighting equipment Power Supply Monitoring main frame, and receives the command information that described fire-fighting equipment Power Supply Monitoring main frame sends; Described DI state acquisition circuit 40 is connected to fire-fighting equipment on and off switch auxiliary contact, for receiving the state of described fire-fighting equipment on and off switch auxiliary contact, and the state collected is sent to main control MCU 10;Described analog quantity acquisition circuit 50, for gathering the voltage and current signal of the fire-fighting equipment power supply monitored, is filtered voltage and current signal and nurses one's health, and the signal after processing is sent to described main control MCU 10; Described control output circuit 30 is also connected to additional alarm device, for controlling external additional alarm device work.
Intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor 100 of electric current in this utility model add key circuit 60, user-friendly. By the operation button on sensor panel, the running parameter of sensor can be set by user, and this makes Way of Sensor Deployment present multiformity, convenient for users to use. Further, since the communications parameter of device is set also by button, therefore eliminate toggle switch circuit of the prior art. All it is saved in the memorizer in device because of all of running parameter, steady in a long-term, it is to avoid the communication failure problem caused because of the accidental change of communications parameter.
Intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor 100 of electric current in this utility model add buzzer circuit 70, when Sensor monitoring to fire-fighting equipment power failure, sound and light alarm can be carried out together with LED light, auxiliary repair personnel positioning fault, in order to fix a breakdown in time. It addition, compared with visual alarm, acoustic alarm signal is not easily susceptible to the impact of shelter, when sending acoustic alarm signal, it is possible to prompting patrol officer carries out malfunction elimination in time.
Status information display circuit 80 in this utility model farther includes liquid crystal display, the fault message that the voltage x current value and fire-fighting equipment power supply for showing sensor detection in real time exists. The panel of sensor increases liquid crystal display, it is possible to magnitude of voltage that in real time display Sensor monitoring arrives, current value, display fault existing for fire-fighting equipment power supply. Pass through button operation, it is possible to inquire the logout that sensor records easily, the information such as running parameter.
By above-mentioned improvement, not only add the ease for use of sensor and the promptness of warning message transmission, and allow sensor depart from monitoring host computer and independently from being possibly realized, it is particularly suitable for applications in some less occasions of fire fighting device needing monitoring, both meet the requirement of fire-fighting equipment Power Supply Monitoring, reduce again the cost of monitoring system.
In the monitoring sensor 100 of intelligent monitoring fire-fighting equipment supply voltage described in the utility model and electric current, controlling output circuit 30 is control relay circuit. This part circuit primarily serve the purpose of output failure alarm signal, reach to control the purpose of external complementary warning device duty. Core component is 1 road normal-open type relay. Realizing process: the main control MCU 10 of sensor is to this circuit sending action signal, after receiving actuating signal, semaphore request action pressed by core component relay, the Guan Bi conducting of normally opened point, connects the installation's power source of additional alarm. After additional alarm installation's power source is connected, device sends the alarm signals such as corresponding acousto-optic, reaches the purpose of additional alarm.
In the monitoring sensor 100 of intelligent monitoring fire-fighting equipment supply voltage described in the utility model and electric current, analog quantity acquisition circuit 50 includes voltage collection circuit and current collection circuit, referring to Fig. 2. The circuit that described voltage collection circuit is connected in series by current-limiting resistance, voltage transformer, the first sampling resistor and the first add circuit by one or more groups is constituted, described current-limiting resistance one end connects fire-fighting equipment power voltage input terminal, and the other end is connected to described voltage transformer; Described voltage transformer is connected to described first sampling resistor, and described first sampling resistor is connected to the first add circuit, and the first add circuit is also connected to described main control MCU 10.The circuit that described current collection circuit is connected in series by current transformer, the second sampling resistor and the second add circuit by one or more groups is constituted, described current transformer one end connects fire-fighting equipment source current input, the other end connects the second sampling resistor, described second sampling resistor connects described second add circuit, and the second add circuit is also connected to main control MCU 10.
The primarily serving the purpose of of above-mentioned analog quantity acquisition circuit 50 gathers the analogue signals such as the monitored voltage of fire-fighting equipment power supply, electric current, and signal carries out filtering and the conditioning of necessity. For Fig. 2 illustrated embodiment, the core component of analog quantity acquisition circuit 50 is 3 voltage transformers and 3 current transformers. Realize process: the three-phase voltage of monitored fire-fighting equipment power supply is coupled by input with voltage transformer after accurate current-limiting resistance, and three-phase electricity streamline is each passed through the through wires hole of 3 current transformers. Voltage carries out isolation with electric current by respective transformer and gathers, and the outfan at transformer has coupled sampling resistor. Signal has become becoming the voltage signal of fixed proportion relation with input signal after sampling resistor. This voltage signal has just become the signal that can gather for main control MCU 10 analog-digital converter after carrying out the circuit of additive operation then through the reference voltage with 2.4V.
In the monitoring sensor 100 of intelligent monitoring fire-fighting equipment supply voltage described in the utility model and electric current, DI state acquisition circuit 40 is the circuit being made up of one or more photoelectrical couplers, referring to Fig. 3. Primarily serving the purpose of of this part circuit receives deciliter signal of auxiliary contact from monitored fire-fighting equipment on and off switch, indirectly gathers the open and-shut mode of on and off switch. Core component can be one or more photoelectrical coupler, for instance be chosen as 6. Referring to Fig. 3. Realize process: the light emitting diode of the photoelectrical coupler of the auxiliary contact of fire-fighting equipment on and off switch and a 24V power supply and Acquisition Circuit controls side and is collectively forming loop. When auxiliary contact close, the lumination of light emitting diode of 24V power drives photoelectrical coupler, bonder outlet side is a light-sensitive device, and two ends saturation conduction after light causes level to change. This logic level incoming main control MCU 10 of digital pin by main control MCU 10, namely may know that the open and-shut mode of fire-fighting equipment on and off switch after logical judgment.
Compared with prior art, the monitoring sensor of intelligent monitoring fire-fighting equipment supply voltage described in the utility model and electric current, reach following effect:
1) this utility model provides intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor of electric current, collocation method presents multiformity, convenient for users to use. Running parameter is all saved in the memorizer in device, steady in a long-term, it is to avoid the communication failure problem caused because of the accidental change of communications parameter.
2) this utility model provides intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor of electric current, panel increases liquid crystal display, it is possible to display Sensor monitoring arrives in real time magnitude of voltage, current value, display fault existing for fire-fighting equipment power supply. Pass through button operation, it is possible to inquire the logout that sensor records easily, the information such as running parameter.
3) the intelligent monitoring fire-fighting equipment supply voltage of this utility model offer and the monitoring sensor of electric current increase buzzer circuit, reach the purpose of sound and light alarm together with LED light. Acoustic alarm signal is with its unique characteristic, it is possible to prompting patrol officer carries out malfunction elimination in time.
4) this utility model provides intelligent monitoring fire-fighting equipment supply voltage and the monitoring sensor of electric current can depart from monitoring host computer and independently from, it is particularly suitable for applications in some less occasions of fire fighting device needing monitoring, both meet the requirement of fire-fighting equipment Power Supply Monitoring, reduce again the cost of monitoring system.
Described above illustrate and describes some preferred embodiments of the present utility model, but as previously mentioned, it is to be understood that this utility model is not limited to form disclosed herein, it is not to be taken as the eliminating to other embodiments, and can be used for other combinations various, amendment and environment, and in utility model contemplated scope described herein, can be modified by the technology of above-mentioned instruction or association area or knowledge. And the change that those skilled in the art carry out and change are without departing from spirit and scope of the present utility model, then all should in the protection domain of this utility model claims.
Claims (5)
1. the monitoring sensor of an intelligent monitoring fire-fighting equipment supply voltage and electric current, it is connected with fire-fighting equipment Power Supply Monitoring main frame and additional alarm device respectively, including communication interface circuit, main control MCU, control output circuit, DI state acquisition circuit, analog quantity acquisition circuit and status information display circuit, it is characterized in that
The monitoring sensor of described intelligent monitoring fire-fighting equipment supply voltage and electric current also includes key circuit and buzzer circuit, described key circuit, described buzzer circuit, described status information display circuit, described communication interface circuit, described control output circuit, described DI state acquisition circuit and described analog quantity acquisition circuit are connected respectively to described main control MCU
Described key circuit is used for the running parameter to sensor and communications parameter is set and collection data and duty are inquired about;
Described buzzer circuit is for carrying out audible alarm when fire-fighting equipment power failure;
Described communication interface circuit is also connected to described fire-fighting equipment Power Supply Monitoring main frame, for Monitoring Data is sent to described fire-fighting equipment Power Supply Monitoring main frame, and receives the command information that described fire-fighting equipment Power Supply Monitoring main frame sends;
Described DI state acquisition circuit is connected to fire-fighting equipment on and off switch auxiliary contact, for receiving the state of described fire-fighting equipment on and off switch auxiliary contact, and the state collected is sent to main control MCU;
Described analog quantity acquisition circuit, for gathering the voltage and current signal of the fire-fighting equipment power supply monitored, is filtered voltage and current signal and nurses one's health, and the signal after processing is sent to described main control MCU;
Described control output circuit is also connected to described additional alarm device, for controlling external additional alarm device work.
2. the monitoring sensor of intelligent monitoring fire-fighting equipment supply voltage according to claim 1 and electric current, it is characterised in that
Described status information display circuit farther includes liquid crystal display, the fault message that the voltage x current value and fire-fighting equipment power supply for showing Sensor monitoring in real time exists.
3. the monitoring sensor of intelligent monitoring fire-fighting equipment supply voltage according to claim 1 and electric current, it is characterised in that
Described control output circuit is control relay circuit.
4. the monitoring sensor of intelligent monitoring fire-fighting equipment supply voltage according to claim 1 and electric current, it is characterised in that
Described analog quantity acquisition circuit includes voltage collection circuit and current collection circuit,
The circuit that described voltage collection circuit is connected in series by current-limiting resistance, voltage transformer, the first sampling resistor and the first add circuit by one or more groups is constituted, described current-limiting resistance one end connects fire-fighting equipment power voltage input terminal, and the other end is connected to described voltage transformer; Described voltage transformer is connected to described first sampling resistor, and described first sampling resistor is connected to the first add circuit;Described first add circuit is also connected to described main control MCU;
The circuit that described current collection circuit is connected in series by current transformer, the second sampling resistor and the second add circuit by one or more groups is constituted, described current transformer one end connects fire-fighting equipment source current input, the other end connects the second sampling resistor, described second sampling resistor connects described second add circuit, and described second add circuit is also connected to described main control MCU.
5. the monitoring sensor according to arbitrary described intelligent monitoring fire-fighting equipment supply voltage of Claims 1 to 4 and electric current, it is characterised in that
Described DI state acquisition circuit is the circuit being made up of one or more photoelectrical couplers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201521107126.5U CN205317913U (en) | 2015-12-27 | 2015-12-27 | Monitoring sensor of intelligent monitoring fire control device power voltage and electric current |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521107126.5U CN205317913U (en) | 2015-12-27 | 2015-12-27 | Monitoring sensor of intelligent monitoring fire control device power voltage and electric current |
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| CN205317913U true CN205317913U (en) | 2016-06-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116267A (en) * | 2018-09-25 | 2019-01-01 | 希格斯动力科技（珠海）有限公司 | Switching-on and switching-off state detection circuit |
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- 2015-12-27 CN CN201521107126.5U patent/CN205317913U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109116267A (en) * | 2018-09-25 | 2019-01-01 | 希格斯动力科技（珠海）有限公司 | Switching-on and switching-off state detection circuit |
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